/**
 * @fileOverview The "entities" plugin.
 */
(function() {
   // Base HTML entities.
   var htmlbase = 'nbsp,gt,lt,amp';

   var entities =
   // Latin-1 Entities
   'quot,iexcl,cent,pound,curren,yen,brvbar,sect,uml,copy,ordf,laquo,' +
      'not,shy,reg,macr,deg,plusmn,sup2,sup3,acute,micro,para,middot,' +
      'cedil,sup1,ordm,raquo,frac14,frac12,frac34,iquest,times,divide,' +

      // Symbols
      'fnof,bull,hellip,prime,Prime,oline,frasl,weierp,image,real,trade,' +
      'alefsym,larr,uarr,rarr,darr,harr,crarr,lArr,uArr,rArr,dArr,hArr,' +
      'forall,part,exist,empty,nabla,isin,notin,ni,prod,sum,minus,lowast,' +
      'radic,prop,infin,ang,and,or,cap,cup,int,there4,sim,cong,asymp,ne,' +
      'equiv,le,ge,sub,sup,nsub,sube,supe,oplus,otimes,perp,sdot,lceil,' +
      'rceil,lfloor,rfloor,lang,rang,loz,spades,clubs,hearts,diams,' +

      // Other Special Characters
      'circ,tilde,ensp,emsp,thinsp,zwnj,zwj,lrm,rlm,ndash,mdash,lsquo,' +
      'rsquo,sbquo,ldquo,rdquo,bdquo,dagger,Dagger,permil,lsaquo,rsaquo,' +
      'euro';

   // Latin Letters Entities
   var latin = 'Agrave,Aacute,Acirc,Atilde,Auml,Aring,AElig,Ccedil,Egrave,Eacute,' +
      'Ecirc,Euml,Igrave,Iacute,Icirc,Iuml,ETH,Ntilde,Ograve,Oacute,Ocirc,' +
      'Otilde,Ouml,Oslash,Ugrave,Uacute,Ucirc,Uuml,Yacute,THORN,szlig,' +
      'agrave,aacute,acirc,atilde,auml,aring,aelig,ccedil,egrave,eacute,' +
      'ecirc,euml,igrave,iacute,icirc,iuml,eth,ntilde,ograve,oacute,ocirc,' +
      'otilde,ouml,oslash,ugrave,uacute,ucirc,uuml,yacute,thorn,yuml,' +
      'OElig,oelig,Scaron,scaron,Yuml';

   // Greek Letters Entities.
   var greek = 'Alpha,Beta,Gamma,Delta,Epsilon,Zeta,Eta,Theta,Iota,Kappa,Lambda,Mu,' +
      'Nu,Xi,Omicron,Pi,Rho,Sigma,Tau,Upsilon,Phi,Chi,Psi,Omega,alpha,' +
      'beta,gamma,delta,epsilon,zeta,eta,theta,iota,kappa,lambda,mu,nu,xi,' +
      'omicron,pi,rho,sigmaf,sigma,tau,upsilon,phi,chi,psi,omega,thetasym,' +
      'upsih,piv';

   // Create a mapping table between one character and its entity form from a list of entity names.
   // @param reverse {Boolean} Whether to create a reverse map from the entity string form to an actual character.
   function buildTable( entities, reverse ) {
      var table = {},
         regex = [];

      // Entities that the browsers DOM don't transform to the final char
      // automatically.
      var specialTable = {
         nbsp: '\u00A0', // IE | FF
         shy: '\u00AD', // IE
         gt: '\u003E', // IE | FF |   --   | Opera
         lt: '\u003C', // IE | FF | Safari | Opera
         amp: '\u0026', // ALL
         apos: '\u0027', // IE
         quot: '\u0022' // IE
      };

      entities = entities.replace( /\b(nbsp|shy|gt|lt|amp|apos|quot)(?:,|$)/g, function( match, entity ) {
         var org = reverse ? '&' + entity + ';' : specialTable[ entity ],
            result = reverse ? specialTable[ entity ] : '&' + entity + ';';

         table[ org ] = result;
         regex.push( org );
         return '';
      });

      if ( !reverse && entities ) {
         // Transforms the entities string into an array.
         entities = entities.split( ',' );

         // Put all entities inside a DOM element, transforming them to their
         // final chars.
         var div = document.createElement( 'div' ),
            chars;
         div.innerHTML = '&' + entities.join( ';&' ) + ';';
         chars = div.innerHTML;
         div = null;

         // Add all chars to the table.
         for ( var i = 0; i < chars.length; i++ ) {
            var charAt = chars.charAt( i );
            table[ charAt ] = '&' + entities[ i ] + ';';
            regex.push( charAt );
         }
      }

      table.regex = regex.join( reverse ? '|' : '' );

      return table;
   }

   VED.plugins.add( 'entities', {
      afterInit: function( editor ) {
         var config = editor.config;

         var dataProcessor = editor.dataProcessor,
            htmlFilter = dataProcessor && dataProcessor.htmlFilter;

         if ( htmlFilter ) {
            // Mandatory HTML base entities.
            var selectedEntities = [];

            if ( config.basicEntities !== false )
               selectedEntities.push( htmlbase );

            if ( config.entities ) {
               if ( selectedEntities.length )
                  selectedEntities.push( entities );

               if ( config.entities_latin )
                  selectedEntities.push( latin );

               if ( config.entities_greek )
                  selectedEntities.push( greek );

               if ( config.entities_additional )
                  selectedEntities.push( config.entities_additional );
            }

            var entitiesTable = buildTable( selectedEntities.join( ',' ) );

            // Create the Regex used to find entities in the text, leave it matches nothing if entities are empty.
            var entitiesRegex = entitiesTable.regex ? '[' + entitiesTable.regex + ']' : 'a^';
            delete entitiesTable.regex;

            if ( config.entities && config.entities_processNumerical )
               entitiesRegex = '[^ -~]|' + entitiesRegex;

            entitiesRegex = new RegExp( entitiesRegex, 'g' );

            function getEntity( character ) {
               return config.entities_processNumerical == 'force' || !entitiesTable[ character ] ? '&#' + character.charCodeAt( 0 ) + ';'
                  : entitiesTable[ character ];
            }

            // Decode entities that the browsers has transformed
            // at first place.
            var baseEntitiesTable = buildTable( [ htmlbase, 'shy' ].join( ',' ), true ),
               baseEntitiesRegex = new RegExp( baseEntitiesTable.regex, 'g' );

            function getChar( character ) {
               return baseEntitiesTable[ character ];
            }

            htmlFilter.addRules({
               text: function( text ) {
                  return text.replace( baseEntitiesRegex, getChar ).replace( entitiesRegex, getEntity );
               }
            });
         }
      }
   });
})();

VED.config.basicEntities = true;
VED.config.entities = true;
VED.config.entities_latin = true;
VED.config.entities_greek = true;
VED.config.entities_additional = '#39';





